My right click is not working while copying the address bar url of sites.

As you all know copying of address bar url in the case of any imp site visiting is very very imp. But suddenly it's not working. In other words Right click is not working at all.

This happened

Every time Firefox opened

As you all know copying of address bar url in the case of any imp site visiting is very very imp. But suddenly it's not working. In other words Right click is not working at all.
== This happened ==
Every time Firefox opened

Do the shortcut keys Ctrl+C and Ctrl+V work?
Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]